EP 1728783 B1 20091111 - Method and apparatus for synthesizing urea
Title (en)
Method and apparatus for synthesizing urea
Title (de)
Verfahren und Apparat zur Herstellung von Harnstoff
Title (fr)
Procédé et appareil pour la préparation d'urée
Publication
Application
Priority
JP 2005159039 A 20050531
Abstract (en)
[origin: EP1728783A1] In a process and an apparatus for synthesizing urea which synthesize urea from ammonia and carbon dioxide, the operating condition can be grasped easily and with good accuracy. A process for synthesizing urea which includes: a reaction step of obtaining a urea synthesis solution which contains urea, unreacted ammonia, unreacted carbon dioxide and water by causing ammonia and carbon dioxide to react with each other; a stripping step of separating a gas mixture containing the unreacted ammonia and the unreacted carbon dioxide by stripping the urea synthesis solution by using at least a portion of raw material carbon dioxide; a condensing step of obtaining a condensed liquid by condensing the gas mixture in an absorbing medium while cooling the gas mixture; a recycling step of recycling the condensed liquid to the reaction step; and a step of measuring the density of the condensed liquid online. An apparatus for carrying out this process is provided.
IPC 8 full level
B01J 19/00 (2006.01); C07C 273/04 (2006.01)
CPC (source: EP US)
C07C 273/04 (2013.01 - EP US); B01J 2219/00006 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE IT LI NL
DOCDB simple family (publication)
EP 1728783 A1 20061206; EP 1728783 B1 20091111; DE 602006010267 D1 20091224; JP 2006335653 A 20061214; JP 4928740 B2 20120509; US 2006270872 A1 20061130; US 7498464 B2 20090303
DOCDB simple family (application)
EP 06010803 A 20060526; DE 602006010267 T 20060526; JP 2005159039 A 20050531; US 42100206 A 20060530